动态符号与动态地图

Dynamic Symbol and Dynamic Map

地理信息可视化为地图动态特征的表现提供了工具。为适应新技术条件下地图符号的设计，本文在Ｂｅｒｔｉｎ符号参量体系基础上扩展了符号的４个动态参量：发生时长、变化速率、变化次序、节奏，讨论了这些动态参量在突出显示空间定位、描述属性特征、描述动态变化几个方面的应用。在充分分析地理信息变化特征后，提出了动态地图的概念，包括动态地图的定义、动态地图的综合问题以及动态地图在过程再现、实时跟踪、运动模拟领域的功能应用。

Geographic information visualization provides powerful tools to represent visually the dynamic feature. In order to meet the needs of map symbol design based on modern technology, this paper extends Bertins visual symbol system to time area. Four dynamic visual variables which are duration, change rate, change order and rhythm have been added to Bertin symbol system. Some of application of variables is discussed, including enhancing spatial location, describing static attribute and describing dynamic process. After assessing the geographic information characteristics in spatial temporal change, the paper presents the concept of dynamic map. The definition and generalization of dynamic map are illustrated. As to the function of dynamic map, the paper puts forward three implementation areas: post processing, real time tracking and movement simulation.